75 lines
2.2 KiB
Plaintext
75 lines
2.2 KiB
Plaintext
== Why is this an issue?
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Using ``++File.createTempFile++`` as the first step in creating a temporary directory causes a race condition and is inherently unreliable and insecure. Instead, ``++Files.createTempDirectory++`` (Java 7+) or a library function such as Guava's similarly-named ``++Files.createTempDir++`` should be used.
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This rule raises an issue when the following steps are taken in immediate sequence:
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* call to ``++File.createTempFile++``
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* delete resulting file
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* call ``++mkdir++`` on the File object
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*Note* that this rule is automatically disabled when the project's ``++sonar.java.source++`` is lower than ``++7++``.
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=== Noncompliant code example
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[source,java]
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----
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File tempDir;
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tempDir = File.createTempFile("", ".");
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tempDir.delete();
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tempDir.mkdir(); // Noncompliant
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----
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=== Compliant solution
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[source,java]
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----
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Path tempPath = Files.createTempDirectory("");
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File tempDir = tempPath.toFile();
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----
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== Resources
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* OWASP - https://owasp.org/www-project-top-ten/2017/A9_2017-Using_Components_with_Known_Vulnerabilities[Top 10 2017 Category A9 - Using Components with Known Vulnerabilities]
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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=== Message
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Use "Files.createTempDirectory" or a library function to create this directory instead.
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'''
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== Comments And Links
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(visible only on this page)
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=== on 26 May 2015, 12:01:03 Ann Campbell wrote:
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http://nemo.sonarqube.org/coding_rules#rule_key=grvy%3Aorg.codenarc.rule.security.FileCreateTempFileRule
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=== on 29 May 2015, 06:44:07 Nicolas Peru wrote:
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Spec looks good.
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\[~ann.campbell.2] I am wondering about the targeted language Groovy : rule is covered by codenarc and AFAIK we don't have any intention to develop our own groovy analyzer. So should it be covered instead of targeted for groovy ?
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=== on 29 May 2015, 14:47:00 Ann Campbell wrote:
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I wouldn't mark it covered based on a 3rd-party tool. I set it to targeted in case we ever do decide to write our own Groovy rules.
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=== on 1 Jun 2015, 15:07:21 Nicolas Peru wrote:
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Ok !
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=== on 19 Aug 2019, 11:04:23 Pierre-Loup Tristant wrote:
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https://guava.dev/releases/19.0/api/docs/com/google/common/io/Files.html#createTempDir()
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endif::env-github,rspecator-view[]
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